T. arenarius may refer to: Taterillus arenarius, the Robbins's tateril or Sahel gerbil, a rodent species found only in Mauritania Triaeniopholis arenarius, a synonym for Lampropeltis getula, the eastern kingsnake, common kingsnake or chain kingsnake, a harmless colubrid species found in the United States and Mexico
See also Arenarius (disambiguation)